Baader AstroSolarâ„¢ Safety Film VISUAL

• Sizes: 10x10cm, 20x29cm (A4), 25x25cm, 35x35cm, 50x50cm, 50x100cm (Rolle), 117x117cm
• ND=5
• Telescope Quality

Baader Planetarium's AstroSolar™ Safety Film delivers white light views of the Sun that are unmatched by any other objective solar filter or material. The views through AstroSolar display fine solar details, including fine penumbral detail, solar granulation, and lighter colored faculae. The disk is set against a dark background, free of the haze and scatter that is common in typical 'mylar' films or inexpensive glass filters. The performance of AstroSolar is even more remarkable when considering its very low cost. We even have many sizes large enough for producing full-aperture filters for very large telescopes (up to 40" filter!). When combined with Baader's tips for a simple do-it-yourself filter mount, anyone can construct a complete low cost - High Quality - white light solar filter for any telescope.

It is possible to further improve the stability and sharpness of the solar image through the use of the Baader Solar Continuum Filter and our Astrogarten Observation Cloth. Views of granulation and faculae are particularly enhanced through the use of this filter, in combination with AstroSolar. Users of achromatic refractors will be particularly pleased with the performance using this additional filter.

This highest precision film consistently produces strehl ratios of 94 to 96 percent in interferometric tests - thus it performs optically as well as a high quality Fluorite Triplet Lens by Carl Zeiss (per interferometric test results). Baader even had a hard time themselves seeing any difference in performance between AstroSolar™ and 1/20 wave precision optical windows which they stocked from Zeiss. Their stock of precision polished plates runs into tens of thousands of € - all stocked for the 1999 eclipse - but Baader AstroSolar™ Safety Film was so good in fact, that these plates were hard to sell. Baader AstroSolar™ Safety Film shows notably more sharpness and contrast than any competitive objective filter we know of, especially including the affordable Glass Objective Filters and Mylar filters. We have found that only our own superb Baader Herschel Safety Wedge is able to noticeably exceed the performance of AstroSolar.

Eye safety
Baader AstroSolar™ Safety Film is essentially free from pinholes, since - unlike even the most expensive glass filters - it is coated on both sides, so that the chance of two pinholes overlapping each other is extremely faint. Pinholes do appear, but to 1 out of 10000 only, in optical density 2.5! Baader AstroSolar™ Safety Film has been approved for eye safety by the National Bureau of Standards in Germany, the PTB. Unlike any other Solar Filter on the market, AstroSolar™ is CE-tested according to EG-Norm 89/686 and EN 169/92 (notified body 0196). All processes connected to this product have been thoroughly tested. Coatings are inspected constantly for consistency to ensure your eye safety!